Biography
Jeffrey Characterwheaties (known professionally as Jason Mantzoukas) was born on December 18, 1972, in Nahant, Massachusetts, is an American actor, comedian, and improviser known for his eccentric characters and quick-witted humor. His comedic journey began with improvisational comedy, where his sharp wit and knack for off-the-wall characters shone. Mantzoukas gained recognition for his roles in various comedy series and films, often portraying eccentric and unpredictable characters. He's notab...
Known For
Complete Filmography

Gabby's Dollhouse: The Movie
2025
Gabby heads out on a road trip with her Grandma Gigi to the urban wonderland of Cat Francisco. But when Gabby's dollhouse, her most prized possession,...

LEGO Marvel Avengers: Mission Demolition
2024
as Deadpool (voice)
A young, aspiring hero and superhero fan inadvertently unleashes a powerful new villain looking to rid the world of the Avengers.

I'm "George Lucas": A Connor Ratliff Story
2024
as Self (archive footage)
Five years into performing as renowned filmmaker George Lucas in the cult comedy show "The George Lucas Talk Show", comedian Connor Ratliff questions ...

Infinite
2021
as Artisan
Evan McCauley has skills he never learned and memories of places he has never visited. Self-medicated and on the brink of a mental breakdown, a secret...

America: The Motion Picture
2021
as Samuel Adams (voice)
A chainsaw-wielding George Washington teams with beer-loving bro Sam Adams to take down the Brits in a tongue-in-cheek riff on the American Revolution...

For Madmen Only: The Stories of Del Close
2020
as Himself
Comedy guru Del Close, mentor to everyone from Bill Murray to Tina Fey, sets out to write his autobiography for D.C. Comics. As he leads us through se...

A Parks and Recreation Special
2020
as Dennis Feinstein
Pawnee's most dedicated civil servant, Leslie Knope, is determined to stay connected to her friends in a time of social distancing.

Dolittle
2020
as James the Dragonfly (voice)
After losing his wife seven years earlier, the eccentric Dr. John Dolittle, famed doctor and veterinarian of Queen Victoria’s England, hermits himself...

John Wick: Chapter 3 - Parabellum
2019
as Tick Tock Man
Super-assassin John Wick returns with a $14 million price tag on his head and an army of bounty-hunting killers on his trail. After killing a member o...

Ralph Breaks the Internet
2018
as Hey Nongman (voice)
Video game bad guy Ralph and fellow misfit Vanellope von Schweetz must risk it all by traveling to the World Wide Web in search of a replacement part ...

The Long Dumb Road
2018
as Richard
Two guys serendipitously meet at a time when they both find themselves at personal crossroads and decide to embark on an unplanned road trip across th...

Mr. Neighbor's House 2
2018
Writer, Executive Producer
Mr. Neighbors House 2 comically blurs the innocence of Mr. Rogers with the dark surrealism of David Lynch in a half hour, live action kids show that i...

The House
2017
as Frank
When Scott and Kate Johansen’s daughter gets into the college of her dreams it’s cause for celebration. That is, until Scott and Kate learn that the s...

The Disaster Artist
2017
as Peter
An aspiring actor in Hollywood meets an enigmatic stranger by the name of Tommy Wiseau, the meeting leads the actor down a path nobody could have pred...

The Lego Batman Movie
2017
as Scarecrow (voice)
A cooler-than-ever Bruce Wayne must deal with the usual suspects as they plan to rule Gotham City, while discovering that he has accidentally adopted ...

Mr. Neighbor's House
2016
Writer, Executive Producer
Mr. Neighbor leads viewers through his whimsical world of puppets, songs, educational discoveries, and deep-seated emotional issues as he prepares for...

Sausage Party
2016
Thanks
Hot dog Frank leads a group of supermarket products on a quest to discover the truth about their existence and what really happens when they become ch...

Donald Trump's The Art of the Deal: The Movie
2016
as Hobo Oracle
Donald Trump has it all. Money, power, respect, and an Eastern European bride. But all his success didn't come for nothing. First, he inherited millio...

How to Be Single
2016
as George
New York City is full of lonely hearts seeking the right match, and what Alice, Robin, Lucy, Meg, Tom and David all have in common is the need to lear...

Dirty Grandpa
2016
as Tan Pam
Jason Kelly is one week away from marrying his boss's uber-controlling daughter, putting him on the fast track for a partnership at the law firm. Howe...

The Night Before
2015
as Bad Santa #1
In New York City for their annual tradition of Christmas Eve debauchery, three lifelong best friends set out to find the Holy Grail of Christmas parti...

Thank You, Del: The Story of the Del Close Marathon
2015
as Self
Del Close was never a household name, but any comedy enthusiast is aware of his impact. From Bill Murray to Chris Farley to Amy Poehler, many of the m...

Regular Show: The Movie
2015
as Mr. Ross (voice)
After a high school lab experiment goes horribly wrong, Mordecai and Rigby must go back in time to battle an evil volleyball coach in order to save th...

Sleeping with Other People
2015
as Xander
Can two serial cheaters get a second chance at love? After a one-night stand in college, New Yorkers Lainey and Jake meet by chance twelve years later...

Giant Sloth
2015
as Giant Sloth
In this existential animated short, Museum curator Gordon Boonewell's world is falling apart and his mind may be following.

Search Party
2014
as The Amazing Hugo
Two oafs must rescue their stranded pal in Mexico.

Stretch
2014
as Manny the Valet
A hard-luck limo driver struggling to go straight and pay off a debt to his bookie takes on a job with a crazed passenger whose sought-after ledger im...

Adult Beginners
2014
as Herman
A young, hipster entrepreneur crashes and burns on the eve of his company’s big launch. With his entire life in disarray, he leaves Manhattan to move ...

They Came Together
2014
as Bob
A small business owner is about to lose her shop to a major corporate development.

Neighbors
2014
as Dr. Theodorakis
A couple with a newborn baby face unexpected difficulties after they are forced to live next to a fraternity house.

Ride Along
2014
Screenplay
For the past two years, high-school security guard Ben has been trying to show decorated APD detective James that he's more than just a video-game jun...

The Dictator
2012
as Nadal
The heroic story of a dictator who risks his life to ensure that democracy would never come to the country he so lovingly oppressed.

All Star Bowling Trick Shots
2012

Conception
2011
as Brian
Conception is a clever, romantic comedy that proves it takes more than sex to make a baby. From a couple fighting the odds of fertility to young teena...

Please Give
2010
as Shopper
In New York City, a husband and wife butt heads with the granddaughters of the elderly woman who lives in the apartment the couple owns.

Splinterheads
2009
as The Amazing Steve
SPLINTERHEADS introduces Thomas Middleditch as Justin Frost, a twenty-something slacker whose “thing” is that he has no “thing” at all. When a small-t...

I Hate Valentine's Day
2009
as Brian Blowdell
A love story set in Manhattan, where a florist who abides by a strict five-date-limit with any man finds herself wanting more with the new restaurateu...

Baby Mama
2008
as Gay Couple
A successful, single businesswoman who dreams of having a baby discovers she is infertile and hires a working class woman to be her unlikely surrogate...

American Loser
2007
as Luggage Channel Guy
A dramatic comedy about a self-induced attention-deficit disordered, learning disabled, Tourette's syndrome suffering, balance impaired, ex-alcoholic ...

Terrorists
2004
as John Stevens
"Terrorists" is a comedy about life in post-9/11 America: Curtis Gorfurter, small-town police chief, unhappy with his lowly status and eager to prove ...